已知,xyz≠0,且2x+3y=3x-8y=5z,则(x+y)/(x-y)的值.
已知,xyz≠0,且2x+3y=3x-8y=5z,则(x+y)/(x-y)的值.
已知xyz≠0,且2x+3y=3x-8y=5z,则x+y/x-y的值是
已知:(x+y)/z=(x+z)/y=(z+y)/x,且xyz不等于0,则分式(x+y)(x+z)(z+x)/xyz的值
已知XYZ不等于0,且2X+3Y=3X-8Y=5Z,求X+Y\X-Y的值
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
已知:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知 xyz≠0,且x+3y+z=0,2x+3y-z=0,求x+2y-7z/3x+5y+z 的值..
已知xyz不等于0,且x+2y-z=0,7x-y-z=0,求x+y+z/2x-y-z的值.
已知x,y,z属于R+(正实数),且xyz(x+y+z)=4+2*根号下3,则(x+y)(y+z)的最小值是?
若xyz不等于0,且满足(y+z)/x=(x+z)/y=(x+y)/z,求(y+z)(x+z)(x+y)/xyz的值